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Effects of sodium butyrate on proliferation of human gastric cancer cells and expression of p16 geneShen, Wen-Jing; Dai, Dong-Qiu; Teng, Yue; Liu, Jie
Zhong hua yi xue za zhi, 2008-Apr-29, Volume: 88, Issue: 17Journal Article
To investigate the effects of sodium butyrate (NaB), a histone deacetylase inhibitor (HDACI), on the proliferation of human gastric cancer cells and the expression of p16, an important negative-regulatory factor of the cell cycle G1. Human gastric cancer cells of the lines SGC7901 and BGC823 were cultured in RPMI1640 medium and treated with NaB of different concentrations: 5 x10(-4), 1 x 10(-3), 3 x 10(-3), and 5 x 10(-3) mol/L for 24 h or 72 h. MTT assay, flow cytometry, and annexin V-fluorescein isothiocyanate staining were performed to analyze the cell proliferation activity, cell cycle, and apoptotic rate. RT- PCR, Western blotting, and methylation-specific PCR (MSP) were used to detect the e mRNA and protein expression and methylation state of p16 gene respectively. Exposure to different concentrations of NaB inhibited the growth of the SGC7901 and BGC823 cells. Treated with NaB of the concentrations of 1 x 10(-3), 3 x 10(-3), and 5 x 10(-3) mol/L respectively for 72 h, the numbers of the SGC7901 and BGC
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